JPH02249701A - Vehicle wheel - Google Patents

Abstract

PURPOSE:To ventilate the atmosphere through the hollow of a spoke part as a wheel rotates to improve its cooling effect by providing an intake port and an exhaust port respectively connected to the outside atmosphere on the front and rear sides of the hollow spoke with respect to the direction of rotation. CONSTITUTION:A vehicle wheel (a) consists of a hub part 1 loaded on the axle, plural spoke parts 2 radially extending from the hub part 1, and a rim part 3 for connecting the top parts of the spoke parts to each other. In this case, an intake port 9 for connecting the hollow part 8 inside the spoke part 2 to the outside atmosphere is provided on the rim part 3 side of the front side 6 of the spoke part 2 with respect to the direction of rotation. Further, an exhaust port 10 for similarly connecting the hollow part 8 to the outside atmosphere is provided on the hub part 1 side of the rear side 7 of the spoke part 2 with respect to the direction of rotation. Following the rotation of wheel (a), the atmosphere is ventilated from the intake port 9 of the spoke part 2 through the hollow part 8 to the exhaust port 10, thus to efficiently cool the spoke part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a vehicle wheel, and more particularly to a one-piece cast wheel having spoke portions.

(Prior art) Conventionally, vehicle wheels have been equipped with rubber tires.
Used in conjunction with a brake device. Frictional heat is generated in the rubber tires, and frictional heat is also generated in the brake plates of the brake equipment, shortening the tire life and reducing braking performance. Therefore, such frictional heat is dissipated through the wheels.

On the other hand, as a conventional vehicle wheel used for a motorcycle or the like, one in which a hub part, spokes, rib part, and rim part are integrally cast is known. In this case, there are also known vehicle wheels in which the spokes have a hollow structure to reduce weight (for example, Japanese Patent Laid-Open Nos. 60-92101 and 61-9275).
No. 4).

In the case of a vehicle wheel having such a hollow spoke part, a through hole opened in the axial direction of the wheel is formed on the rim part side of the spoke part. This through hole is the remains of a small tree used to fix the core when forming a hollow part in the spoke part, and later this through hole was used as a drainage hole (Japanese Patent Application Laid-Open No. 61-92754 ).

(Problems to be Solved by the Invention) However, in the above-mentioned conventional vehicle wheel,
The through holes formed in the spokes are open in the direction of the wheel's axis, so even when the wheel rotates, outside air does not flow through the hollow parts of the spokes.Therefore, no heat dissipation effect can be expected. There was a problem.

The present invention has been made to solve the above problems, and aims to provide a vehicle wheel with excellent heat dissipation performance by mainly improving the structure of the spoke part in an integrally cast wheel. .

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides an intake port that communicates the outside with a hollow portion of the spoke portion at the front surface in the rotation direction of the spoke portion, and The other surface is characterized by having an exhaust port that communicates the hollow portion with the outside.

(Function) In the vehicle wheel configured as described above, atmospheric air flows into the spoke portion from the intake port as the wheel rotates, and the air that flows in is discharged to the outside from the exhaust port. Therefore, tire heat conducted from the rim portion to the spoke portions or brake heat conducted from the hub portion to the spoke portions is effectively radiated.

(Example) Hereinafter, a vehicle wheel according to the present invention will be explained based on the drawings.

1 to 3 show a first embodiment of the present invention, in which a vehicle wheel (hereinafter referred to as "wheel") a includes a hub portion 1 attached to an axle, and a hub portion 1 approximately extending from the hub portion 1. It has a plurality of hollow spoke parts 2 that extend radially, and a rim part 3 that connects the tips of these spoke parts 2, and is integrally formed by casting a light alloy such as aluminum.

In the hub part 1 of this embodiment, brake plate mounting holes 4, 4, etc. are provided concentrically at equal intervals, and an outer peripheral wall 5 partitioning the interface with the spoke part 2.
is provided.

The surface of the spoke part 2 in the rotational direction (direction of arrow A) of the wheel a, that is, the rotational direction front surface (hereinafter referred to as "front surface") 6, is located in the tangential direction of the outer circumference of the hub part 1, while the opposite surface, that is, the rotational direction front surface (hereinafter referred to as "front surface") Directional rear surface (hereinafter referred to as "rear surface J") 7
The extension line is located at the center of the hub 11. Further, as shown in FIG. 2.3, the spoke portion 2 is connected to the hub portion 1
It is formed so as to become gradually thinner from J toward the rim portion 3rIIU, and its cross-sectional shape is formed into an oval shape in which the rear surface 7 side is smaller than the front surface 6111, thereby reducing air resistance as much as possible.

Rim portion 31 on the front surface 6 of the spoke portion 2! I is provided with an intake port 9 that communicates the hollow part 8 provided in the spoke part 2 with the outside (atmosphere), and the hub part 11\lI of the rear surface 7 is provided with an air intake port 9 that communicates with the hollow part 8 provided in the spoke part 2. An exhaust port 10 communicating with the outside (atmosphere) is provided.

The intake port 9 and the exhaust port XO can be easily formed by using the small wood remains of the core for obtaining the hollow portion 8. That is, like the conventional through-hole that also serves as a water drain, it can be made when the wheel a is cast.

When the wheel a configured as above is rotated in the direction of arrow A, the air pressure on the front side 6 becomes higher than on the rear side 7. and,
Since the intake port 9 opens on the front side in the rotational direction of the spoke part 2, outside air is forced to flow into the hollow part 8 from here, moves inside the hollow part 8 toward the hub part 1, and l! 1! ! 5 and is discharged to the outside from the exhaust port 10 (see arrow port).

Since the intake port 9 is located on the rim portion 31111 of the spoke portion 2, the circumferential speed is high, so the pressure at this intake port 9 is higher, and air inflow is further promoted.

Further, since the exhaust port 10 is located on the back side of the spoke portion 2 in the rotational direction, it is maintained at a negative pressure, and therefore the pressure difference between the exhaust port 10 and the intake port portion is large, and the flow of air within the hollow portion 8 is further promoted.

Therefore, the wheel a is effectively cooled by heat dissipation from the outer circumferential surface of the spoke portions 2 to the atmosphere and heat dissipation due to forced air circulation within the spoke portions.

In this embodiment, since the hub portion 1 is provided with the side wall 5, the strength of the hub portion 1 can be increased in addition to the function of guiding air circulation within the hollow portion 8 as described above.

FIG. 4 shows a second embodiment of the present invention,
The difference from the first embodiment is that the side wall 5 of the hub portion 1 is omitted, and the hollow portion 8 of each spoke portion 2 is formed into a continuous layer.

In this embodiment as well, as in the above-described embodiments, air circulates within the hollow portion 8 and a cooling effect on the wheel can be obtained. Furthermore, in this embodiment, the core of the spoke portion 2 is made of a single core, and the locations supported by the core are uniform, so that the core can be supported precisely.

Therefore, the effect of making the thicknesses of the spoke portions 2 and the hub portion 1 more uniform can be obtained.

FIG. 5 shows a third embodiment of the present invention,
This embodiment differs from the second embodiment in that the exhaust port 10 on the rear surface 7 is provided on the side wall surface 11 of the hub portion 1.

In this embodiment, the exhaust gas is evacuated from a plurality of exhaust ports 10 as shown by the dotted lines in a pond that can obtain the same effect as the second embodiment, and the effect is that the exhaust action can be performed more easily. be.

In the present invention, when the exhaust port is provided on a surface other than the front surface in the rotational direction of the spoke portion, it must be understood that this also includes the case where the exhaust port is provided on the hub portion 1 as in this embodiment.

In the embodiment described above, the intake port 9 and the exhaust port 10
Although one spoke portion 2 is provided with one each, a plurality of such portions may be provided as long as the strength of the spoke portion 2 allows.

Further, the intake port 9 may be provided on the hub portion 1 side of the spoke portion 2, and the exhaust port 10 may be provided on the rim portion 3@. In this case, the turbulent flow generated by the back surface of the rim portion 3
This has the effect of promoting the exhaust action of.

Further, the exhaust port 10 may be provided on a side surface of the spoke portion 2 other than the front surface 6, but if it is provided on the rear surface 7 as in the above-mentioned embodiment, negative pressure will be generated and the exhaust effect will be high. preferable.

Further, in the above-described embodiment, the number of spoke portions 2 is three, but it goes without saying that the number may be four or more.

(Effects of the Invention) The wheel according to the present invention has an intake port provided on the front surface of the spoke portion and an exhaust port provided on a surface other than the front surface, so that as the wheel rotates, the air intake port flows from the hollow portion. Since air flows in and the air is discharged from the exhaust port, the wheel has an excellent cooling effect.

[Brief explanation of drawings]

1 to 3 show a first embodiment of a wheel according to the present invention, in which FIG. 1 is a partially cutaway front view, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 3 is a sectional view taken along line 11 in FIG. 1, FIG. 4 is a partially cutaway front view showing the second embodiment, and FIG.
The figure is a partially sectional front view showing the third embodiment. a...Vehicle wheel, 1...Hub part, 2...Spoke part, 3...Rim part, 8...Hollow part, 9...Intake port, O...Exhaust port. Figure 1 A Figure 2 Figure 3

Claims (1)

[Scope of Claims] A vehicle wheel having a hub portion, hollow spoke portions extending radially from the hub portion, and a rim portion connecting the tips of the spoke portions, comprising: a front surface in the rotational direction of the spoke portions; The vehicle is characterized in that: is provided with an intake port that communicates between the outside and the hollow portion of the spoke portion, and is provided with an exhaust port that communicates the hollow portion with the outside on a surface other than the front surface in the direction of rotation. Wheel for.